Sedimentary (Alluvial Deposit)

Yellow Jasper

Silicon Dioxide with Goethite (SiO2 + FeO(OH))

Gold Nugget

Native Gold (Au)

Gold Nugget

Native Gold (Au)

Ruby (Pinkish-Red)

Corundum (Al2O3 with Chromium trace)

Rough Ruby

Corundum (Al2O3) with Chromium traces

Yellow Sapphire

Corundum (Al2O3)

Quartz-rich pebble, possibly chert or silicified limestone

Microcrystalline quartz (SiO₂), possibly chalcedony; exact identification is uncertain from the photograph

Granite and Mixed Landscape Gravel

Plutonic Igneous Rock / Weathered Alluvium

Raw Ruby (Corundum)

Corundum (Aluminum Oxide, Al2O3)

Chinese Jade (Green Nephrite or Jadeite)

Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)

Aquamarine

Beryl (Be3Al2Si6O18)

Corundum (Sapphire and Ruby)

Aluminum Oxide (Al2O3)

Gold Nugget

Native Gold (Au)

Gold Flakes

Native Gold (Au)

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Yellow Sapphire

Corundum (Al2O3)

Yellow Sapphire

Corundum (Al2O3)

Gold Nugget

Gold (Au)

Ruby (in a ring setting)

Corundum (Al2O3:Cr)

Yellow Sapphire

Corundum (Al2O3)

Carnelian Bracelet

Carnelian (Cryptocrystalline Quartz, SiO2)

Kyawthuite

Kyawthuite (Bi3+Sb5+O4)

Diamond

C (Carbon)

Diamond

Native Carbon (C)

Blue Topaz (Cut Gemstone)

Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)

Diamond

Carbon (C)

Yellow Diamond (Faceted)

Diamond (C - Pure Carbon)

Diamond (in a jewelry setting)

Carbon (C)

Diamond (in jewelry)

Diamond (Carbon, C)

Diamond

Carbon (C)

Quartz (Water-worn pebble)

Silicon Dioxide (SiO2)

Diamond

Native Carbon (C)

Diamond (Cut Gemstone)

Carbon (C)

Diamond

Carbon (C)

Diamond (Faceted)

Carbon (C)

Diamond

C (Native Carbon)

Diamond

Carbon (C)

Quartz (Translucent/Rose variety)

Silicon Dioxide (SiO2)

Corundum (Pink Sapphire / Ruby)

Al2O3 (Aluminum Oxide)

Diamond (in jewelry mount)

Carbon (C)

Conglomerate

Polymictic Conglomerate

Carnelian (orange chalcedony)

Chalcedony, microcrystalline quartz (SiO₂), iron-colored variety